Writing instrument



FIG. 1 is a front elevational view of a writing instrument embodying my invention;

FIG. 2 is a front elevational view of a writing instrument showing the pen tip as exposed;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a rear elevational view thereof, showing the pen tip as exposed;

FIG. 5 is a side elevational view thereof, showing the pen tip as exposed;

FIG. 6 is a side elevational view thereof;

FIG. 7 is an alternate side elevational view thereof; and,

FIG. 8 is an alternate side elevational view thereof, showing the pen tip as exposed. 

The ornamental design for a writing instrument, as shown and described. 